Commit c682e4c3 authored by David Gow's avatar David Gow Committed by Miguel Ojeda
Browse files

rust: kernel: Mark rust_fmt_argument as extern "C" 



The rust_fmt_argument function is called from printk() to handle the %pA
format specifier.

Since it's called from C, we should mark it extern "C" to make sure it's
ABI compatible.

Cc: stable@vger.kernel.org
Fixes: 247b365d ("rust: add `kernel` crate")
Signed-off-by: default avatarDavid Gow <davidgow@google.com>
Reviewed-by: default avatarGary Guo <gary@garyguo.net>
Reviewed-by: default avatarBjörn Roy Baron <bjorn3_gh@protonmail.com>
Reviewed-by: default avatarVincenzo Palazzo <vincenzopalazzodev@gmail.com>
[Applied `rustfmt`]
Signed-off-by: default avatarMiguel Ojeda <ojeda@kernel.org>
parent e5e86572

rust/kernel/print.rs

+5 −1
Original line number Diff line number Diff line
@@ -18,7 +18,11 @@ use crate::bindings; 


// Called from `vsprintf` with format specifier `%pA`.

#[no_mangle]

unsafe fn rust_fmt_argument(buf: *mut c_char, end: *mut c_char, ptr: *const c_void) -> *mut c_char {

unsafe extern "C" fn rust_fmt_argument(

    buf: *mut c_char,

    end: *mut c_char,

    ptr: *const c_void,

) -> *mut c_char {

    use fmt::Write;

    // SAFETY: The C contract guarantees that `buf` is valid if it's less than `end`.

    let mut w = unsafe { RawFormatter::from_ptrs(buf.cast(), end.cast()) };